2L more air

[4Ruster]

2L non turbo. I'm noticing above a certain amount of throttle the truck stops accelerating and spews coal out the back. I realize this is a lack of air getting in. This is a problem a turbo would solve (I am in the middle of collecting turbo parts for a swap eventually). However in the time being, it will stay N/A. I'm just trying to figure out ways to allow more air to get in. I did take the intake tube off coming from the headlight area to the airbox as I'm missing the front part that reaches fresh air, I haven't tested it out, but I assume less piping will allow for more air to come in easier. Also would I be able to swap in a bigger air box? Perhaps a cummins air box? I might have to sacrifice my second battery, but it would allow more air.

 

[4Ruster]

Here's a video of it accelerating as much as it can before it blows coal. Didn't have enough road to get up to 100km/h.

 

[GTSSportCoupe]

You either need to reduce max load fuel or increase air.

As far as increasing air goes, all the standard things apply as to any engine. Although you're revving slower with a diesel, so there will be less CFM compared to an equivalent displacement gas motor.

To get more air:

- Rev it higher. Remember, IDI diesels actually like to rev some. The bore/stroke of the 2L series is especially well suited to maintaining power to a relatively high rpm. I've found my 2LTE likes to make peak power at 3200-3400rpm. EGTs drop there and it even gets decent fuel economy during extended fast highway runs.

- High flow filter or new filter box. Heck, try just putting fine screen over your intake manifold inlet and take it for a rip to see if there is a difference (just not dusty road!).

- Cold air intake. Cold air is denser with more air molecules.

- Different cam shaft suited to flow more at higher rpm. I went to 3L cam and noticed a distinct increase in power at higher rpm due to longer duration and more lift. Not worth the cost generally, but I couldn't help myself. I don't think this mod works for the roller/rocker first gen 2L like yours either...

- Better exhaust and exhaust manifold. Reduce back pressure means the motor moves more air.

All that stuff is expensive and probably not practical. Turbo is the answer really, or tuning max fuel back. Some ideas there anyhow tho.